diff --git a/src/main/kotlin/platform/mixin/inspection/injector/InvalidInjectorMethodSignatureInspection.kt b/src/main/kotlin/platform/mixin/inspection/injector/InvalidInjectorMethodSignatureInspection.kt
index be2da73a6..8ee3617c7 100644
--- a/src/main/kotlin/platform/mixin/inspection/injector/InvalidInjectorMethodSignatureInspection.kt
+++ b/src/main/kotlin/platform/mixin/inspection/injector/InvalidInjectorMethodSignatureInspection.kt
@@ -248,7 +248,7 @@ class InvalidInjectorMethodSignatureInspection : MixinInspection() {
             if (expectedReturnType is PsiPrimitiveType || methodReturnType is PsiPrimitiveType) {
                 return false
             }
-            return isAssignable(expectedReturnType, methodReturnType)
+            return isAssignable(methodReturnType, expectedReturnType)
         }
 
         private fun checkParameters(